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Electric Circuits

Electric Circuits
Which of following materials has the least resistivity ?

  Copper.
  Zinc.
  Mercury.
  Lead.

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Electric Circuits
The current in the resistor R shown in figure will be

 0.6 A.
 0.2 A.
 0.4 A.
 0.8 A.

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Electric Circuits
When a lossy capacitor with a dielectric of permittivity ε and conductivity σ operates at a frequency ω the loss tangent for the capacitor is given by

 σ ω ε.
  σ/ω ε.
 ω σ/ε.
 ω ε/σ.

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Electric Circuits
A network contains linear resistors and ideal voltage sources. If values of all the resistors are doubled, then voltage across each resistor is

 remain same.
 increase by two times.
 doubled.
 halved.

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Electric Circuits
Which of the following is the correct relation?

 AD-BC = 1.
 AC-BD = 1.
 all of these.
 AB-CD = 1 .

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Electric Circuits
A parallel plate capacitor contain there dielectric layers of 1, 2 and 3 respectively and thickness of dielectric layers are 0.2 mm, 0.3 mm and 0.4 mm respectively. If area of plate is 20 cm2. What is the value of capacitance?

 None of them.
 36.6 pF.
 32 pF.
 30 pF.

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MORE MCQ ON Electric Circuits

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